Open AccessExperimental implementations of 2D IR spectroscopy through a horizontal pulse shaper design and a focal plane array detector
Author(s) -
Ayanjeet Ghosh,
Arnaldo L. Serrano,
Tracey A. Oudenhoven,
Joshua S. Ostrander,
Elliot C. Eklund,
Alexander F. Blair,
Martin T. Zanni
Publication year - 2016
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.41.000524
Subject(s) - optics , cardinal point , detector , spectroscopy , pulse shaping , physics , spectrometer , materials science , optoelectronics , laser , quantum mechanics
Aided by advances in optical engineering, two-dimensional infrared spectroscopy (2D IR) has developed into a promising method for probing structural dynamics in biophysics and material science. We report two new advances for 2D IR spectrometers. First, we report a fully reflective and totally horizontal pulse shaper, which significantly simplifies alignment. Second, we demonstrate the applicability of mid-IR focal plane arrays (FPAs) as suitable detectors in 2D IR experiments. FPAs have more pixels than conventional linear arrays and can be used to multiplex optical detection. We simultaneously measure the spectra of a reference beam, which improves the signal-to-noise by a factor of 4; and two additional beams that are orthogonally polarized probe pulses for 2D IR anisotropy experiments.